Looking at the image full size (original) there are a few fibers that are "doubled" vertically. But this is not consistent across the frame---the doubled ones are on the middle right. Misalignment of the stacked frames? The dreaded shutter shock?

I am curious....

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tex_andrews, co-founder and webmaster of The LightZone Project, an all-volunteer group providing the free and open source LightZone photo editing software. Personal website: www.texandrewsart.com"Photography is the product of complete alienation" Marcel Proust"I would like to see photography make people despise painting until something else will make photography unbearable." Marcel Duchamp